Established in December 1988, Extelcom was granted a provisional authority to install, operate and maintain a Cellular Mobile Telephone System (CMTS) in Metro Manila by the National Telecommunications Commission.

[1] In May 1989, limited operations commenced with the installation of Extelcom's first switch in Antipolo and three cell sites in Metro Manila.

In October 1992, Extelcom was granted a certificate of public convenience and necessity (CPCN) by the NTC.

The NTC in September 2001 gave Extelcom 5 MHz frequency in the 1800 bandwidth for its planned GSM operations.

It dropped its GSM plans in 2003 in favor of deploying a network based on the CDMA protocol.